YUMA, Arizona (KTRK) -- Hundreds of migrants were arrested in Arizona, after crawling through holes under the U.S.-Mexico border.
Authorities say U.S. border patrol caught nearly 400 people entering the country illegally through seven holes dug under a steel border fence.
They believe smugglers dug the holes, but they haven't been found.
Most of the groups are families from Guatemala, including nearly 200 children.
Nearly 400 migrants tunnel under border fence to enter United States from Mexico
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